One major drawback of using Google Map on the iPhone is that it does not offer voice guidance. Therefore, it is not suitable for navigation unless you have someone read the directions for you. However, the newly updated MapQuest 4 Mobile now offers voice guidance at an attractive price: it’s free.
On top of the voice guidance, the other new features for this version include off-route assistance and twin tap to zoom out. Like Google Map, MapQuest 4 Mobile operates in two modes: Map and Directions. If you log on to your AOL or MapQuest account, your saved My Places will be synchronized to the iPhone. This makes it easy to enter multiple places. A row of icons near the bottom lets you turn on POI (Points of Interest) displayed on the map. It provides a visual cue about the nearby POI.
There are some restrictions about the program. There is only one view offered in Directions mode, which is the north up 2D view. It does not speak the street name (text to speech) either. Some online reviews indicate that this application works in the US only.